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Hypoxia-inducible factor 1 alpha (HIF-1 alpha) gene expression in human ovarian carcinoma.

Abstract：

:Hypoxia-inducible factor 1 alpha (HIF-1 alpha) that regulates genes involved in response to hypoxia and promotes neo-angiogenesis, is a transcriptional factor for vascular endothelial cell growth factor (VEGF). The aim of this study was to examine the expression of HIF-1 alpha and VEGF gene expressions and their relation to angiogenesis, clinicopathologic variables and survival in the patient with human ovarian carcinoma. We retrospectively analyzed HIF-1 alpha and VEGF gene expression levels using reverse transcriptase polymerase chain reaction (RT-PCR) in 60 ovarian carcinomas. Intratumoral microvessel density (IMD) was assessed by immunostaining endothelial cells, using anti-CD 31 antibody in frozen sections. The relationships between the expression level of these genes, IMD and clinicopathologic variables were evaluated by Student's t-test and chi-square tests. Survival analysis was performed by Kaplan-Meier curves. HIF-1 alpha or VEGF gene expression level was independent of age, clinical stage and histological subtype besides grade of tumor. There was no relationship between HIF-1 alpha or VEGF gene expression level and IMD in all carcinomas (R=0.118 and 0.224, respectively). In addition, a weak association between HIF-1 alpha and VEGF gene expression level was observed (R=0.300, P=0.020). The association between VEGF gene expression and IMD was observed (R=0.501, P=0.016). However, no association between IMD and HIF-1 alpha gene expression was observed. Further, both HIF-1 alpha and VEGF gene expression levels had no effect on survival in the patient with ovarian carcinoma. These results suggest that VEGF upregulated by HIF-1 alpha gene may be involved in angiogenesis of some type of ovarian carcinoma, but the expression levels of both genes have no effect on survival in the patients with ovarian carcinoma.

journal_name

Cancer Lett

journal_title

Cancer letters

authors

Nakayama K,Kanzaki A,Hata K,Katabuchi H,Okamura H,Miyazaki K,Fukumoto M,Takebayashi Y

doi

10.1016/s0304-3835(01)00762-5

keywords:

subject

Has Abstract

pub_date

2002-02-25 00:00:00

pages

215-23

issue

eissn

0304-3835

issn

1872-7980

pii

S0304383501007625

journal_volume

176

pub_type

杂志文章

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Hypoxia-inducible factor 1 alpha (HIF-1 alpha) gene expression in human ovarian carcinoma.